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Home » Engineering » Computer Science » Aptitude Test - 33
1.The OF is called as
A. overflow flag
B. overdue flag
C. one flag
D. overflow flag
2.The IF is called as
A. initial flag
B. indicate flag
C. interrupt flag
D. initial flag
3.The register AX is formed by grouping
A. AH & AL
B. BH & BL
C. CH & CL
D. AH & AL
4.The SP is indicated by
A. single pointer
B. stack pointer
C. source pointer
D. single pointer
5.How many letters of symbol is assigned to instruction to facilitate writing symbolic program?
A. 2
B. 3
C. 4
D. 2
6.In memory reference instructions, the address part has numbers of bits equal to?
A. 10
B. 11
C. 12
D. 10
7.In an indirect address instruction, the first hexadecimal digit ranges in value from?
A. 0-E
B. 0-6
C. 8-F
D. 0-E
8.In direct mode, the first hexadecimal digit ranges in value from?
A. 0-E
B. 0-6
C. 8-F
D. 0-E
9.The computer can execute the program only when they are represented in?
A. Binary
B. Assembly
C. High-level
D. Binary
10.Who translates symbolic instruction into one binary coded instruction?
A. Compiler
B. Interpreter
C. Assembler
D. Compiler
11.The program that translates a high-level language program to binary is called as?
A. Translator
B. Interpreter
C. Assembler
D. Translator
12.Which of the following instruction cannot be in octal program?
A. 2008
B. 1010
C. 0652
D. 2008
13.With help of which we can shift memory location of next instruction?
A. END
B. SFT
C. ORG
D. END
14.If some address contains DEC -23, then the hexadecimal number it stores?
A. 0023
B. FFE9
C. 0017
D. 0023
15.Which field of assembly language program cannot be empty?
A. Instruction
B. Label
C. Comment
D. Instruction
16.As per rule of language, which of the given symbolic address is invalid?
A. A
B. XY1
C. PQ (D) ABCD
D. A
17.As per rule of language, which of the given symbolic address is invalid?
A. AB
B. PQR
C. MN2
D. AB
18.A symbolic address in the label field should be terminated by which special character?
A. Full-stop
B. Comma
C. Semicolon
D. Full-stop
19.Which of the following is not pseudo-instruction?
A. HLT
B. ORG
C. END
D. HLT
20.In the basic computer, each character is represented by an 8-bit code. The high-order bit is always?
A. 0
B. 1
C. x
D. 0
21.A low memory can be connected to microprocessor by using
A. INTER
B. RESET IN
C. READY
D. INTER
22. To put the microprocessor in the wait state
A. lower the HOLD input
B. lower the READY input
C. raise the HOLD input
D. lower the HOLD input
23.A basic instruction that can be interpreted by a computer generally has
A. An operand and an address
B. A decoder and an accumulator
C. Sequence register and decoder
D. An operand and an address
24.In a microprocessor system with memory mapped I/O
A. Devices have 8-bit addresses
B. Devices are accessed using IN and OUT instructions
C. There can be a maximum of 256 input devices and 256 output devices
D. Devices have 8-bit addresses
25.The addressing mode used in an instruction of the form ADD X, Y, is
A. absolute
B. immediate
C. indirect
D. absolute
26.The ability to temporarily halt the CPU and use this time to send information on buses is called
A. Direct memory access
B. Vectoring the interrupt
C. System Interrupt
D. Direct memory access
27. Number of machine cycles required for RET instruction in 8085 microprocessor is
A. 1
B. 2
C. 3
D. 1
28.In a microprocessor system, the RST instruction will cause an interrupt
A. only if an interrupt service routine is being executed
B. only if a bit in the interrupt mask is made 0
C. only if interrupts have been enabled by an EI instruction
D. only if an interrupt service routine is being executed
29.An instruction used to set the carry flag in a computer can be classified as
A. Data transfer
B. Process control
C. Logical
D. Data transfer
30. Microprocessor 8085 is the enhanced version of ......... with essentially the same construction set
A. 6800
B. 68000
C. 8080
D. 6800
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