Advanced level 2024 HIHS mock computer science 1
Advanced level 2024 HIHS mock computer science 1
A de-multiplexer has:
A. One data input and several outputs
B. One input and several outputs
C. Several inputs and several outputs
D. Several inputs and one output
2. Convert the fractional decimal number 6.75
to binary
A. 0111.1100
B. 0110.1010
C. 0110.1100
D. 0110.0110
3. What is the equivalent in hexadecimal
representation of the decimal number 973?
A. 4BC
B. CB4
C. 6D
D. 3CD
4. A personal computer program counter is also
called
A. Instruction pointer
B. Memory pointer
C. Data counter
D. File pointer
5. A tree input NOR gate gives logic high output
only when
A. One input is high
B. One input is low
C. All inputs are high
D. All inputs are low
6. In which addressing mode is the operand given
explicitly in the instruction?
A. absolute
B. Immediate
C. Indirect
D. Direct
7. Pipelining strategy is also known as
A. Instruction execution
B. Instruction prefetch
C. Instruction decoding
D. Instruction manipulation
8. In virtual memory system, the address used by
the programmer belongs to
A. Memory space
B. Physical address
C. Address space
D. Main memory address
9. The speed of the processor depends on
A. Data bus width
B. Access time
C. Response time
D. Address bus width
10. On receiving an interrupt from an I/O device,
the CPU
A. Halts for a predetermined time
B. Branches off the interrupts service routine after
completion of the current instruction
C. Branches off to the interrupt service routine
immediately
D. Hands over control of address bus and data bus
to the interrupt device
11. What is the function of the control unit in the CPU?
A. To transfer data to primary storage
B. To store program instruction
C. To perform logic operations
D. To decode program instruction
12. The time data elapses between the initiation of an
operation and completion of that operation is called;
A. Throughput
B. Memory response time
C. I/O response time
D. Execution time
13. A time sharing system implies
A. More than one processor in the system
B. More than one program in memory
C. More than one memory in the system
D. More than one operating system in the computer
14. In terms of minimizing the average waiting time of a
given set of processes, the optimal scheduling algorithm is;
A. First Come First Served
B. Shortest Job First
C. Round Robin
D. Priority Job First
15. A process in the blocked state is moved to the ______
state when the event for which it has been waiting occurs.
A. Running
B. Ready
C. Suspending
D. Exit
16. An object code is usually produced by;
A. An interpreter
B. A linker
C. A compiler
D. A loader
