System Unit Components Exercises


What is the name of the single circuit board that provides the path through which the processor communicates with memory components and peripheral devices?
a. Motherboard b. Master board c. Circuit master d. Bus master

What small computers control the operation of peripheral devices?
a. Microprocessors b. Microcomputers c. Device controller d. Bus masters.

Which of the following is NOT a function of the control unit?
a. To read and interpret program instructions.
b. To monitor network connections
c. To direct the operation of internal processor components
d. To control the flow of programs and data in and out of RAM

The processor’s high-speed working storage areas that store only a few bytes are called?
a. Decoders b. Registers c. Units d. Modules

The program register contains the:
a. Instruction being executed
b. Location in RAM of the next instruction to be executed
c. Results of the arithmetic and logic unit.
d. Instruction that is being decoded

Which type of PROM is found on all new PCs, I/O devices, and storage devices and is easily altered by the user?
a. RIMM b. SIMM c. DIMM d. Flash

How is an instruction cycle measured?
a. Instruction time or l-time only
b. Calculation time or C-time only
c. Execution time or E-time only
d. The lotal of l-time and E-time

CISC means:
a. Completely integrated serial computer
b. Coded instruction set computer
c. Common interactive sequential computer
d. Complex instruction set computer

The ability of processors to execute another instruction before the current instruction is
completed is called:
a. Parallel processing b. Multiprocessing c. Pipelining d. Streamlining

The new USB 2.0 standard is times faster that the original USB standard.
a. 2 b. 10 c. 40 d. 100

Which bus is also called FireWire?
a. PCI local bus b. Universal Serial Bus (USB) c. 1394 Bus d. SCSI

What port transmits data via infrared light waves?
a. IrDA b. USB 2.0 c. 1394 d. Parallel

What percent of PCs uses an Intel processor?
a. 50 b. 75 c. 90

Which hardware components of computer are usually found inside of the systems unit?
a. Processor, main memory and monitor
b. Processor, main memory and secondary memory
c. First, second, and third memory
d. The keyboard, the disks, and the memory

Which of the following is driving force of a computer?
a. Computer clock b. Input device c. Output device d. Memory

Which of the following is the main component of the computer?
a. Memory b. output unit c. Input Unit d. CPU

The CPU is an example of:
a. Software b. Program c. Hardware d. Input unit

CPU stands for
a. Central Processing Unit
b. Central Product Unit
c. Computing Program Usage
d. Central Programming Unit

The arithmetic/logic unit performs the following actions:
a. Control computer operations
b. Perform arithmetic functions such as addition and subtraction etc.
c. Perform logical comparisons, such as equal to, greater than, less than
d. Both b and c

The CPU includes all of the following components except:
a. Primary storage b. ALU c. Control Unit d. Register

Which component of CPU decides which operations are to be performed by the CPU?
a. ALU b. Control unit c. Register d. None

Which component of CPU compares the contents of two pieces of data?
a. ALU b. Control Unit c. Memory d. None

Which of the following is not used for data storage?
a. Disk b. Control unit c. RAM d. Register

All of the following are performed by the control unit except:
a. Executing an instruction
b. Storing data into registers
c. Fetching an instruction from memory
d. Determining the meaning of an instruction

Which component of CPU interacts with primary memory?
a. ALU b.control unit c. central processor d. Bus

Magnetic memory is also called:
a. RAM b. DVD-ROM c. Cache Memory d. Disk Memory

RAM is:
a. Volatile b. Nonvolatile c. Slow d. permanent storage

A bus line consists of:
a. Registers b. Accumulators c. Parallel data path d. Computer clock

A set of electrical paths that transport data from one part of the computer to another is called:
a. Bus b. Monitors c. Computer clock d. None

A type of buses that are used to control the sequence of operations while program is
executed is called:
a. Data bus. b. control bus c. Address bus d. None

Additional data and programs not being used by the CPU are stored in:
a. Secondary Storage b. Input Units c. Output Units d. CPU

Step by step instructions that run the computer are called:
a. Hardware b. Documents c. CPU d. Software

When CPU executes an instruction, which of the following happens first
a. Data fetch b. Instruction fetch c. Instruction execute d. Interpret instruction

Which of the following change the sequence of program?
a. Change program instruction
b. Control Transfer instruction
c. Data Transfer instruction
d. Change Sequence instruction

The process of translating instructions into commands is called:
a. Fetching b. Decoding c. Executing d. Transferring

Computer operations are synchronized by:
a. CPU clock b. Input device c. output device d. RAM

The system clock:
a. Keeps the time of day.
b. Keeps the system’s processing time.
c. Determines how long data remains in memory.
d. Measures data transfer time.

The clock rate of a processor is measured in:
a. Kilobyte b. Megahertz c. Megabyte d. Kilohertz

The shortest period of time:
a. Millisecond b. Nanosecond c. Pico second d. Microsecond

MHz is an abbreviation for:
a. Megahertz b. Milli hertz c. Micro hertz d. None

Temporary storage area within in the CPU are called:
a. Registers b. Accumulator c. ROMs d. RAM

All of the following may be stored in registers except:
a. Program instructions b. Memory addresses c. Data d. CPU instruction set

Registers that collect the results of computation are called:
a. General purpose b. Main Storage c. Storage registers d. Accumulator

The size of the accumulator register is:
a. 1 to 4 bit b. 1 to 4 kB c.1 to 4 bytes d. 1 to 4 MB

The size of DI, SI, SP and BP stack control register is:
a. 2 bytes each b. 6 bytes each c. 4 bytes each d. 8 bytes each

Which is not a kind of register?
a. Flag b. Segment c. Accumulator d. Math coprocessor

How many events happen on a CPU while executing an instruction?
a. 5 b.4. c.3 d.6

Which of the following factors does not affect computer processing speed:
a. Register b. RAM c. Speed of system clock d. Keyboard size

The CPU consists of the following parts:
a. CU and Main Memory
b. Control Unit and ALU
c. Main Memory and storage
d. Operating system and application

The data that is input into the ALU must reside in:
a. Secondary storage b. Control unit c. RAM d. Registers

Which of the following is not used for data storage?
a. Disk b. the control unit c. RAM d. Registers

Random access memory is located in:
a. Registers on the CPU
b. a chip near the CPU
c. Magnetic devices external to the computer
d. Bus lines on a microprocessor

Large amounts of memory can be stored least expensively in:
a. RAM. b. Registers. c Secondary storage. d. Primary storage.

A program’s instructions are stored in primary memory:
a. As long as a particular instruction is being processed in the ALU.
b. As long as the program is installed on the computer.
c. As long as the program is executing on the system.
d. As long as the user is interacting with the program.

The term used to describe the steps of fetching decoding, executing and storing the results of program instructions is:
a. Processing. b. Machine cycle. c. Instruction setting. d. I-time.

Machine cycle refer to:
a. l-time b. E-time c. Both l-time and E-time d. Neither I-time nor E-time.

Which of the following actions is done during the I-time of the machine cycle?
a. Decoding the instruction
b. Fetching the data to be processed by the instruction
c. Executing the instruction
d. Storing the results of the instruction

The unit of electronic circuitry that represents a single bit is called a
a. Chip b. Motherboard. c. Transistor. d. Register.

The following are all Intel chips or Intel-like chips except:
a. Xeon b. Celeron c. Cyrix d. Power PC

Which of the following is a volatile form of memory?
a. RISC b. Semiconductor RAM c. Flash RAM d. Programmable ROM

Which of the following can be used for permanent storage of changeable data?
a. Cache b. Semiconductor RAM c. Flash RAM d. Programmable ROM

Which of the following is the correct sequence of slowest-to-fastest RAM technologies?

Which form of RAM utilizes battery power to retain information while computer is off?
a. DRAM b. SRAM c. L2 Cached. d. CMOS RAM

Which of the following is the most likely use for static RAM technology?
a. Primary memory b. Secondary storage c. Cache memory d. Registers

Expansion slots connect interface cards to:
a. Ports. b. Peripheral devices. c. Motherboard. d. System bus.

A port provides an interface between:
a. Expansion board and a peripheral device.
b. Adaptor card and the motherboard.
c. The CPU and Ll cache.
d. DRAM and SRAM.

Which is the correct correspondence of cycle time and cycle speed?
a. Picosecond – gigahertz
b. Millisecond-megahertz
c. Nanosecond – kilohertz
d. Nanosecond – gigahertz

Which of the following storage areas are kept within the CPU?
a. DRAM b. L1 Cache c. L2 Cache d. MIP RAM

Which of the following technologies pertain to the size of a CPU’s instruction set?

The ability to execute one instruction while the next is being fetched is made possible via:
a. Multiprogramming. b. Pipelining. c. Supercomputing d.CISC.

Which of the following involves the use of multiple processors in a single computer?
a. Pipeline processing
b. RISC processing
c. Parallel processing
d. Microprocessing

Built-in vocabulary of instructions that the processor can execute on a given computer is called:
a. Language b. Instruction set c. Chip size d. High-level language

The processors determines how individual components of the processor are put together on a chip.
a. Architecture b. Density c. Power distribution d. Both a and c

A computer processor with a smaller instruction set is sometimes classified as:

A computer processor with a larger instruction set is sometimes classified as:

The difference between a RISC and a CISC is:
a. RISC is faster b. RISC is smaller c. CISC is larger d. all of the above

The difference between RISC and CISC is:
a. RISC is slower b. CISC is smaller c. CISC is slower d. both b&c

Older Macintosh systems used processors developed and manufactured primarily by:
a. IBM b. Motorola c. Intel d. AMD

Newer Macintosh systems use processors developed and manufactured primarily by:
a. IBM b. Motorola c. Intel d. AMD

Most PCs and Macintoshes use processors of what size?
a.128-bits b. 64-bits c. 32-bits d. 16-bits

Some embedded and special-purpose computer still use processors of what size?
a. 64-bits .c. 16-bits c. 8-bits d. Both cand d

The term primary Storage is used to refer to:
a. Memory b.Таре c. Disk d. Both a and c

The most common type of primary storage to:
a. ROM b. EPROM c. RAM d. DOS

The acronym RAM stands for:
a. Readily available memory
b. read and more memory
c. Random access memory
d. remember all memory

An inherent characteristic of RAM is that it is:
a. Read only b. Writes only c. Nonvolatile d. Volatik

The acronym ROM stands for
a. Recursive online memory
b. Rapid online memory
c. Random only memory
d. None of above

An inherent characteristic of ROM is that it is:
a. Read only c. Volatile d. Nonvolatile d. Both band d

The difference between ROM and RAM is a:
a. ROM chips are larger
b. ROM is nonvolatile
c. ROM is read only
d. both cand d are correct

The type of memory used to store the date and calendar in a PC is called:
a. MODS b. RAM c. ROM d. CMOS

Nonvolatile RAM used in cell phones and pagers is stored in what kind of memory chips?
a. Zip b. Flash c. Laser d. Synchronized

For Macintosh computers, CMOS RAM is called:
a. Parameter RAM. b. Flash memory c. EPROM d. PROM

One big reason flash memory is NOT used as primary storage in personal computers is its:
a. Limited availability b. Inability to be written to c. Size d. cost

Access time for most memory is __ than access time for disk.
a. Bigger b. Longer C. Słower d. Faster

Access time for most memory is measured in:
a. Microseconds . b. Milliseconds c. Nanoseconds d. Megahertz

32-bit bus is ___than a 16-bit bus
a. Wider b. Longer c. Faster. d. Both a and c

Cards or boards used to connect additional devices to computer are connected to
motherboard via:
a. Expansion slots b. Links c. Bays d. Cornectors

A port on the computer may be connected to:
a. Expansion card b. CPU c. Motherboard d. Both a and b

Users can customize their computers by inserting special-purpose circuit boards into :
a. Ports b. Houses c. Slots d. PC cards

The external devices that are connected to a computer system are known as:
a. Expansion card b. Peripherals c. Buses d. Slots

How many separate on/off switches would be required in order to represent all the possible characters of the ASCII character code?
a. 10 b. 256 c. 8 d. 64

How many separate on/off switches would be required in order to represent all the possible
characters of the Unicode character code?
a. 10 b. 256 c. 8 d. 16

The EBCIDIC representation of the word hello takes:
a. 5 bytes b. 256 bits. c. 5 bits. d. 10 words.

The Unicode representation of the word hello takes:
a. 5 bytes. b. 256 bits. c. 5 bits d. 10 bytes

The smallest unit of information in the computer is a:
a. Character b. word c. bit d. byte

A bit can represent how many different values?
a. 0 b. 1 c. 2 d. 3

The meaning of the value of a bit is:
a. on or off b. one or zero c. yes or n d. all of the above

A binary message can be sent using:
a. One bit b. two bits c. Three bits d. four bits

A byte is _ bit(s)
a. 1 b. 2 c.4 d. 8

The most widely used code for representing characters in

The ASCII coding system can provide _ different representations.
a. 2 b.4. c. 16 d. 256

A group of bits can represent
a. Characters b. colors c. Sounds d. all of the above

Combinations of bits are used to represent:
a. Data. b. The CPU. c. Programs. d. Both a and care correct

Fill in the Blanks

  1. ______component of the CPU is responsible for interacting with primary memory. Control unit
  2. ______ component of the CPU is responsible for comparing the contents of two pieces of data. ALU
  3. ______ operator is used to tests for equality or inequality of two data values. Relational
  4. A true/false value is the result of a ______ operation. Logical
  5. During a calculation, the data that is input into the ALU resides in temporary storage locations called ______. Registers
  6. The______involves the following steps: fetching, decoding, executing, and storing. Machine cycle
  7. The ______contains all the machine commands that a CPU can understand and perform. Instruction set
  8. The purpose of the ______ is to synchronize the computer operations of the CPU and RAM. System clock
  9. The control unit knows where to look in memory for data or instruction because each data item in memory is identified by a specific ______. Address
  10. A ______consists of eight bits. Byte
  11. The word gigahertz means a billion machine ______. Cycles
  12. Each character in a Unicode representation takes two ______ of storage space. Bytes
  13. A transistor represents a single ______ of data. Bit
  14. ______storage is lost when the electrical current is turned off. Volatile
  15. ______ RAM utilizes battery power to retain information while the computer is shut off. CMOS
  16. SRAM technology is used mostly for L2 ______ memory. Cache
  17. The term ______ refers to the number of bits that can be transmitted from memory to the CPU in one fetch. Bus width
  18. The system bus width is normally the same as a CPU’s ______. Word size
  19. Interface cards are connected to peripheral devices via ______. Expansion slots (or ports)
  20. ______cache is contained within the CPU. Expansion slots
  21. ______technology minimizes the number of CPU instructions in a system’s instruction set. RISC
  22. ______provides the ability for one instruction to execute while the next is being fetched. Pipelining
  23. The chips of a computer are located on the ______. Motherboard
  24. A ______is a set of electronic paths that transfer electrical signals between different chips. bus
  25. A ______port transmits one bit at a time. Serial
  26. A ______port transmits multiple bits at a time. Parallel

True / False

  1. The circuit board on which the processor and other chips are placed is called the master board. F
  2. The CPU is a peripheral device. F
  3. Software written for a Macintosh computer will run on an IBM-compatible computer. F
  4. Backward compatible means that older processors can process instructions handled by newer processors. F
  5. Clock speed and architecture both contribute to how fast a computer can process. T
  6. Clock speed is measured in megahertz. T
  7. Word size is the number of bits a computer can process at one time. T
  8. The arithmetic logic unit takes the instruction read by the prefetcher and translates it into a form suitable for the CPU’s internal processing. F
  9. Execution of instructions is performed by the arithmetic logic unit (ALU). T
  10. CISC is using a smaller instruction set to achieve faster processing. F
  11. A series of processors that are compatible are called CISC. F
  12. Research has shown that RISC processors are slower and less efficient than CISC processors. F
  13. Reduced instruction set computing system uses fewer instructions to achieve faster processing. T
  14. RISC is using parallel processing with the inherent risk that it will fail. F
  15. One acceptable way of increasing computer processing speed is to use multiple processors. T
  16. The most common type of primary storage is ROM. F
  17. The most common type of primary storage is RAM. T
  18. ROM contains start-up instructions. T
  19. Volatile memory permanently stores information. F
  20. The type of memory used to store the date and calendar is ROM. F
  21. RAM is generally nonvolatile. F
  22. ROM is nonvolatile. T
  23. CMOS is used to store commonly used programs. F
  24. Information travels between components on a bus. T
  25. A port may be connected to the motherboard. T
  26. Flash memory is used in cell phones and pagers. T
  27. Access time for memory is generally faster than access time for disk. T
  28. A PC card is credit card sized and may contain memory or miniature peripherals. T

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