Q.91  A ___________development system and an ______are essential tools for writing large assembly language programs.
   
   Ans: Microprocessor, assembler
       
Q.92  In an operation performed by the ALU, carry bit is set to 1 if the end carry C8 is ________. It is cleared to 0 (zero) if the carry is ______  _______.
 
   Ans: One, zero     
 
Choose the correct alternative   
 
Q.93  A successive A/D converter is  
   (A)  a high-speed converter.    (B)   a low speed converter.
   (C)  a medium speed converter.  (D)  none of these.
 
   Ans: C
 
Q.94  When necessary, the results are transferred from the CPU to main memory by  
   (A) I/O devices.      (B) CPU.
   (C) shift registers.  (D)  none of these.
 
   Ans: B
 
Q.95   The gray code equivalent of  (1011)_2 is  
_=Base
   (A)  1101.  (B)  1010.
   (C)  1110.  (D)  1111.
 
   Ans: C
      
Q.96 A combinational logic circuit which sends data coming from a single source to two or more separate destinations is  
  (A)   Decoder.     (B)  Encoder.
  (C)  Multiplexer.  (D)  Demultiplexer.
   
  Ans: D
 
Q.97  In which addressing mode the operand is given explicitly in the instruction  
  (A)  Absolute. (B)  Immediate.
  (C)  Indirect. (D)  Direct.
 
  Ans: B
     
Q.98 A stack organized computer has
   (A)  Three-address Instruction.  (B)  Two-address Instruction.
   (C)  One-address Instruction.    (D)  Zero-address Instruction.
   
   Ans: D
 
Q.99 A Program Counter contains a number 825 and address part of the instruction contains the number 24. The effective address in the relative address mode, when an instruction  is read from the memory is   
(A)  849.  (B)  850.
(C)  801.  (D)  802.
 
  Ans: B
 
Q.100  A system program that translates and executes an instruction simultaneously is   
  (A)  Compiler.   (B) Interpreter.   
  (C)  Assembler.  (D) Operating system.   
 
  Ans: C
 
Q.101  The cache memory of 1K words uses direct mapping with a block size of 4 words.  How many blocks can the cache accommodate.
  (A)  256 words.   (B)  512 words.
  (C)  1024 words.  (D)  128 words.
 
  Ans: A
 
Q.102 A page fault    
  (A)  Occurs when there is an error in a specific page.   
  (B)  Occurs when a program accesses a page of main memory.
  (C)  Occurs when a program accesses a page not currently in main memory.  
  (D)  Occurs when a program accesses a page belonging to another program.
 
  Ans: C