Daily practice for the 2020 Computer Level 2 C Language Test (June 23)

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Daily practice for the 2020 Computer Level 2 C Language Examination (June 23)

1. The following cannot correctly copy the string pointed to by s to the storage space pointed by t is ( ).

A.do{*t++=*8++;}while(*s);

B.for(i=0;t[i]=s[i] ;i++);

C.while(*t=*s){t++;s++;}

D.for(i=0, j=0;t[i++] =s[j++];);

Answer: A

2. If int x, y; is defined and the variables are correctly assigned, then the following options are consistent with the expression ( x?y)?(x++) The conditional expression (x?Y) in (y++) is equivalent to ( ).

A.(x?Y<01Ix?Y>O)

B.(x?y<0)

C.(x?Y> 0)

D.(x?Y==0)

Answer: A

3. The following statement is wrong ( ).

A. Programs using three basic structures can only solve simple problems

B. Structured programs are composed of three basic structures: sequence, branch, and loop.

< p>C.C language is a structured programming language

D. Structured programming advocates a modular design method

Answer: A

4. When converting an E?R diagram into a relational model, both entities and relationships can be expressed as ().

A. Attribute

B. Key

C. Relationship

D. Domain

Answer: C

5.The number system that cannot be represented in the C source program is ().

A. Hexadecimal

B. Octal

C. Decimal

D. Binary

Answer: D

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