1. Which of the following microprocessors is not 8 bit microprocessor?
a) 8085
b) 6502
c) Z80
d) 68000
e) None of these
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Ans d) 68000, The Motorola 68000 (“‘sixty-eight-thousand'”; also called the m68k or Motorola 68k, “sixty-eight-kay”) is a 16/32-bitCISC microprocessor core designed and marketed by Motorola Semiconductor Products Sector.
2. Microprocessor 8085 is the enhanced version of which essentially the same construction set
a) 6800
b) 8080
c) 6800A
d) 8000
e) All of these
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Ans b) 8080
3. Which of the following interrupts has the lowest priority?
a) RST 5.5
b) RST 7.5
c) TRAP
d) INTR
e) None of these
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Ans d) INTR
The INTR is a maskable interrupt for the 8085. It has the lowest priority and is also non vectored. When this INTR signal goes into the high state the following things occur / take place:
– For every instruction that is executed the 8085 checks the status of this interrupt./
– Till an instruction is completed the signal of INTR will remain high. Once an instruction is completed the processor sends an acknowledgement signal INTA.
– As soon as the INTA signal goes low a new opcode is placed on the data bus for transfer.
– Once the new instruction is received the processor saves the address of new instruction into the STACK and an interrupt service subroutine begins.
4. The Data control language (DCL).
a) is used to manage user access to data bases
b) is used to manipulate the contents of a database in some form
c) Both (1) and (2)
d) Used for inserting, deleting and updating data in a database
e) None of these
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Ans a) is used to manage user access to data bases
5. A collection of fields is called a record with respect of DBMS, a record corresponds to
a) Tuple
b) Relation
c) File
d) Attribute
e) None of these.
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Ans a) Tuple
6. Multiplexer means
a) One into many
b) Many into one
c) Many into many
d) All of these
e) None of these
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Ans b) Many into one
7. Which gate is known as universal gate ?
a) NOT gate
b) NAND gate
c) AND gate
d) XOR gate
e) None of the above
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Ans b) NAND gate
8. Which of the following is the first integrated logic family?
a) TCL
b) T1L
c) DTL
d) MOS
e) RTL
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Ans e) RTL (Register Transfer Level)
In digital circuit design, register-transfer level (RTL) is a design abstraction which models a synchronous digital circuit in terms of the flow of digital signals (data) between hardware registers, and the logical operations performed on those signals.
9. A top to bottom relationship among the items in a database is established by a
a) Hierarchical schema
b) Network Schema
c) Relational Schema
d) Both (1) and (2)
e) Both (2) and (3)
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Ans a) Hierarchical schema
A hierarchical database model is a data model in which the data is organized into a tree-like structure. The data is stored as records which are connected to one another through links.
10. In the relational schema, each tuple is divided into fields called.
a) Relations
b) Domains
c) Queries
d) Both (1) and (2)
e) Both (1) and (3)
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Ans b) Domains
