### Digital Electronics Objectives Part 16

**301 . ** Micro-processors find application in** pocket calculators, scientific instruments and medical equipment.**

**302 .** Microprocessor were introduced in year **1971.**

**303 . ** In Von-Neumann-or-Princeton-type computer, the program** can appear anywhere within the memory.**

**304 . ** Once the information is placed into a read only memory **it can’t be modified easily.**

**305 . ** Flag bits in arithmetic unit provide **status type information.**

**306 . ** The fetching, decoding and executing of an instruction is broken down into several time intervals, Each of these intervals, involving one or more clock periods, is called a** machine cycle.**

**307 . ** In LIFO **only the top of the stack is immediately accessible.**

**308 . ** The degree of nesting is dependent upon **the storage capacity of the stack.**

**309 . ** Match the following:

Number system digit symbols

(a) Ternay (i) 0,1,3

(b) Quaternary (ii) 0,1,2,3,4,5,6,7,8,9,A,B

(c) Quinary (iii) 0,1,2,3,4

(d) Duodecimal (iv) 0,1,2

**a—(iv), b—(i), c—(iii), d—(ii)**

**310 . ** ** Option C **is correct

**311 .** Match the following

Laws of Boolean algebra Relation

(a) Distributive law (i) x + x = x

(b) Demorgans law (ii) x(y+z)=xy+xz

(c) Idempotent law (iii) (𝑥) = x

(d) Involution law (iv) (x+y) = 𝑥𝑦**a—(ii), b—(iv), c—(i), d—(iii)**

Relation

(i) Distributive law (i) x + x = x

(ii) Demorgans law (ii) x(y+z)=xy+xz

(iii) Idempotent law (iii) (𝑥) = x

(iv) Involution law (iv) (x+y) = 𝑥𝑦

**312 . ** **Option D **is correct

**313 .** 64 K is **65536**

**314 . ** ** 𝟐𝟏𝟐** bytes are there in 1111 1011 0111 0100 1010.

**315 .** Fig.56 shows an 8 bit LED display. A light circle means a LED is on (binary 1) and a dark circle means a LED is off (binary 0)** 172 **is the decimal equivalent of the binary display.

**316 . ** A microcomputer has memory locations from 0000 to FFF, each storing 1 byte. **16,384** can be stored by memory.

**317 . ** A microcomputer has a 64 K memory,** 0000** is the hexadecimal notation for the first memory.

**318 . ** In the above case the hexadecimal notation for the last memory location is **FFFF.**

**319 . ** ** TTL **is the most widely bipolar family.

**320 . ** **ECD **is the fastest logic family used in high speed application.