Technical Questions asked in Oracle

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Which of the following data structures are used in RDBMS.
1. Graph
2. Array of structures
3. Trees
4. None of these
Answer: Option B.
NULL is
1. the same as 0 for integer
2. the same as blank for character
3. the same as 0 for integer and blank for character
4. not a value
Answer: Option D.

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Choose the proper statement
1. :volatileisareserved keywordinC++
2. :userdefinedvariablescanalsobeoverloadedalongwithmethodandoperators.
3. :'bool' keywordisusedforlogicalvalues
4. :Both Aand C
Answer: Option D.
Analyse the following code snippet: ClassTemp
{
private:
charm_acEmpName[25];
public:
char*GetFirstChar()
{
strcpy(m_acEmpName,"Hello");
returnthis->m_acEmpName;
}
};
intmain(intargc,char**argv)v {
Temp oTempObject; cout< } .
1. Displays the first character of the string
2. Displays the complete string Hello
3. Error
4. Displays the last character of the string
Answer: Option B.
using' in C++ is for.
1. 'using' does not exist in C++
2. used for library functions
3. 'using' is a literal in C++
4. used for pointers
Answer: Option B.
Note : it is also used often for namespaces.
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Which of the following statements is true after execution of the program?
int a[10],I,*p;
a[0]=1; a[1]=2; p=a; (*p)++;
1. a[0]=2
2. a[1]=3
3. a[1]=1
4. a[0]=3
Answer: Option A.
Explanation: base adderss of array a[] is assigned to p, *p gives value hold by base address, thus (*p)++ increment the value hold by base address by one

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